Apparatus for precipitation.



D. C. WALKER.

'APPARATUS FOR PRECIPITATION.

APPLICATION FILED 11.14. 1916. RENEWED AUG. 24. 1918.

Patented Oct. 15, 1918* A TTORNEYS D. C. WALKER.

APPARATUS FOR PRECIPITATION.

APPLICATION man MAR. 14,1916. RENEWED AUG. 24. 1918.

Patented Oct. 15, 1918,

2 SHEETS-SHEET 2.

no u w ll) u 900000000 5 9000000505000 WITNESSES Jwm ATTORNEYS DAVI 03m n WAL -E12 or ANACOND'A; MONTANA.

AZE'PARATUS FOR PRECIPITATION.

Specificationot "Letters Iatent.

Patentedflctg- 1551918.;

Appiicationfiledfltlarcbl, 1916; Serial No. 84,062. Renewed Aug ust;24;.191 8. Serial-No, 251,340.

To alllwhom it may concern." 7

Be it-c-knownthat.L-Davzcp EC. WALKPQYAY CitlZBlF-lg-Qf the United States, and I; a,res1dent of Anaconda, in the county of Deerlodge and;

State; of Montana, have invented a new .1 and Improved Apparatus for JBrecipitation, of. hich the o11 Wi g- -isra 1 11, a and; ex:- actt de cripti a An l obj ect; of .the :invention is. to. provide 1 an apparatus for vthepcontinuous .precipita:

tiont ofv elid sfrom olution l w ngl h ough-l hesappara ust An th b ect the invention is to ,provide .311 apparatus of.

the "-elasstmentionedg in EWhich {the precipitate. may -tbe remo ved; without. in errup ng the A. f rth j ctoff thgdIlYfiHjtlOIli giswto provide; a simple,- in expensivet ndt automati pp ratus f r; he

process-of PIGQi-Pitatiom prec pi ati fe i e id from l q s .Withthegabdyeand othen objects .inview, the nature of which will more fully appean as, the;descriptiontproceeds the invention consistsgin themovel-iCOI1S1 ruction, combination and arrangemeng of, parts. as here n 7 fully descatibed illustrated and'claimed; In

the accompanying drawings forming. part of the;application snn lar. characters of ref l ansendicate. cor sn nd g p m: all

.Eigu-re =1 .is,a -I.1 elevation of a precipitating;-

apparatus-t embodvingnnyfinvention: and

Fig 2 cent; units ofgthe a-p.parat1 1s.,

Beferringdwthedravvm gs. ,the- .apnaratus comprises aepluralityt :of;-units 3.-3. each unit. comprising; a nrecipitating tank. 4 and asettlin g gtank- 5; The precipitating tanlt -is prefenalplv. of; cylindrical cross section have.

ing ga gf mnel shaned bottom. 61 from ,vvhich: a

conduit, Tfextends, throu 22h ,the closed top 8 oft he-,settling tank. 5, the settlingatankubgeing preferably cone shape, theetop beingzat, the largemdiarnetenof.thetconef. A. conduit 9 rises .ipom the "top of each settling tank to discharge -into theprecipitating} tank 4 oi. h di ht t nitz il h c et nat k-of h last; unit discharging; simply; into, a .vvaste. onduit-t no shown; he r w ngs-1 The conduits; :and act the same unitareunited bym'a valvercontrolled;conduit 10' above-the ettling. atil :v {and} onduitt -7\v and 9 hlas la valverllgbelow' the.-conduit 10.v

Ag. removable; Container 112- is suspended from ,the brim; Withinteach ofg-theprecipitah .1

ing tanksf tso -thatta clearance is -f0rmed loetween thetwalls of thesontainen and; the

i s asectiontthrough-ga pair of:adja

tank,rthe,removable container being 'open at the. .topcand having a perforated bottom 13.

LL portion ofits. Wall near, the bottom, is:also. perforated .This,;'container=, is adapted tocarryuthe solid substance which is used for the precipitation of the solidstfromtheso- 1ution. The; said solid substance is. preterably. in the shape ofshavingsof ametal such as zinc when .a=cya nid:s0lution of gold is .to betreated. Thefsize. of the shavings is 1arger..th an;the perforations of. the contain-.. er s.-. Ats eve orrscreenl l is providedat the of all unitszare onthe same level; consequent1y,- the, :l1quid. level. in each preceding" precipita ting. .tank,Iishigher than in the succeeding; one. .It' follows that the normal hydrostatic head in the succeeding settlin tanks decreasesa There'i an. overflow 17 between each; gpair ofadjacenttanks: and the horizontalbranch ;of;the discharging end of theconduit .9 is slightlvbelow the discharge aperture of the preceding tank. 4, .so there Will be. onlvan overflow from the preceding tank..- into. ,the adj acenttanlnvvhen .there is a materialresistance to flow through the condni-t; 9.

Normallyothe solution flowingvth rou gh the container-into v-thestank-A is directed by the;

conduitj'ltinto. the settling tank ;5 of the. said unit, the -valve-controlled conduitlO being closed.;; Theliquiddelivered to the settling tank- 5 Ifin-ds Fits escape through the conduit 9,-the,valvelll-beingopen; into the container 12, of. the ac lja-cent-unit until it reaches thelast unit, Where the conduit 9 leads toa- WaSte' :CQI1dl1ll3 .}-:The' precipitate formed in the solution; as-it'passes through thematerialwithinthecontainer;12 is' carried into the settling-tank53 Where it will have a tendency tOf accumulate:-v in the'icone .portion thereof,

the 5 liquid part-passing nto the succeeding I unitzth-rough the conduit-2.9a

tanks'may be inspected or the discharge of" sediment facilitated. I a

Any of the containers 12 'can be removed to be. cleaned without stopping the process of precipitation by swinging the sprinkling head 15 out of the container 12 and the horizontal rim of the conduit 9 to one side of the container 4:. The discharge into the tank from the precedingunit will pass into the succeeding unit either through its settling tank or through the conduit 10 without forming any precipitate within the unit where the container is removed.

I claim:

1. In an apparatus for precipitation, a plurality of successive units, each comprising a precipitation tank and a settling tank at a lower level than the precipitation tank, the levels of the successive precipitation tanks being lower than that of the preceding tanks, an overflow from the preceding to the succeeding precipitation tanks, a perforated container in each precipitation tank for a substance to cause a precipitate from a solution flowing through the container, means fordelivering a solution tothe first precipitation tank, a valve-controlled conduit from the precipitation tank to the settling tank of the same unit to discharge the solution, with the precipitate formed, into the settling tank, a screen in each precipitation tank between'the container and said conduit, a valve-controlled conduit from the settling tank to the container of the successive precipitation tank to convey the liquid part of the solution from the settling'tank to thesucceeding unit, avalve-controlled conduit connecting the discharge conduit of the precipitation: tank with'the'conveying conduit of the settling'ta'n k whereby the precipitation tank of a preceding unit can discharge directly into the precipitation tank of the succeeding unit, and means for washing out the sediment from the settling tank. I

"2; In an apparatus for precipitation; a

plurality ofsuccessive units, each comprising a. precipitation tank and a settling tank at a lower level than the precipitation tank, the

levels of the successlve precipitation tanks being lower than the level of the preceding tank, adischarge conduit/from the precipiconduit 7 being adapted to deliver liquid under the hydrostatic head of the unit, a conduit joining the first two conduits above the settling tank, valves associated with all of said conduits whereby the flow from the discharge conduit can be made direct through the delivery conduit without aflow through the settling tank, and means for washing out the sediment from the settling tank. I

3. In an apparatus for precipitation, a plurality of successive units each unit com: prising a precipitation tank, a removable, perforated container suspended within said tank, a cone-shaped settling tank below the precipitationtank, a conduit'from the precipitation tank to the settling tank, 'aco'n duit rising from the settling tank to a-point below the level of the liquid in the precipitation tank to dischargev into the precipitation tank of a successive unit, a conduit joining the rise and the discharge conduits above the settling tank, and valves for all of said conduits for directingthe flow from the discharge conduit through the rising conlczluit without a flow through the settling tan v v 4. In an apparatus for precipitation, a plurality of successive units each unit comprising a precipitation tank having a fun nel-shaped bottom, a removable, perforated container suspended from the brim of said 100 tank, a cone-shaped settling tank ,havin a closed top at the larger diameter thereo a valve-controlled discharge conduit from the funnel-shaped bottom to the top of the settling tank, a screen sepvaratin'g'said conduit 105 from the container, a valve-controlled rising, conduit from the'precipitation tank to a point below the liquid level of the precipitation tank for discharging into aj'perforated container of a successive unit, an'over- 110 flow from the precipitation tank to the precipitation tank of the successive unit, at valve-controlled conduit connectingj the dis charge and 7 rising conduits above-their 7' valves, and means forsupplying'a' spray to? said-settling tank. V i I 5. In an apparatus for precipitatiom 'a plurality ofsuccessive units each unit com f I Q 7 I charge conduit from the top of the sett1in'g 12'5 f V V tank to a point below the level of the pre 'cipitation tank, wher'ethrou hia'liquid flow is caused by said hydrostatic head into the precipitation tank of a successive unit, and means-associated with said conduits at a point above the settling tank for diverting the flow from the precipitation tank to the settling tank and into the discharge conduit.

6. In an apparatus for precipitation, a plurality of successive units each comprising a precipitation tank and a settling tank at a lower level than the precipitation tank, all of said settling tanks being at a substantially common level, the level of the succeeding precipitation tanks being lower than that of the preceding tanks, an overflow from the preceding to the succeeding precipitation tanks, each of said precipitation tanks hav 'ing a funnelshaped bottom, a perforated container suspended from the brim of each of said tanks above the funnel-shaped bottom, a screen separating the bottom from the container, each of said settling tanks being cone-shaped and having a closed top which is at the larger diameter of the cone, a valvecontrolled conduit from each precipitation Copies of this patent may be obtained for tank to the settling tank of same unit, a valve-controlled conduit rising from the top of the settling tank to the container of the succeeding precipitation tank, the hydrostatic head within said conduit being slightly less than that of the settling tank of the same unit, a valve-controlled conduit connecting the discharge and rising conduits at a point above their valves, whereby the flow of the settling tank may be diverted into the rising conduit of the same unit, and means for supplying a spray in each of said settling tanks.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

DAVID CREEL WALKER.

Witnesses:

IRA B. WALKER, H. C. Gn'rnnros.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

